Improvement in heating stoves and drums



'L. H. COMSTOCK.

Improvement in Heating-Stoves and Drums.

No. 132,635. Ptentedom. 29,1872.

LEVI It. COMSTOCK, 0F PHILADELPHIA, PENNSYLVANIA.

IMPRGVEMENT IN HEATING STGVES AND DRUMS.

Specication forming part of Letters Patent No. 132,635, dated October29,1872.

To all whom it may concern:

rBe it known that I, LEVI R. COMSTOCK, of Philadelphia, in the county ofPhiladelphia and State of Pennsylvania, have invented a new and valuableImprovement in Portable Heater and Furnace; and I do hereby decla-rethat the following is a full, clear, and exact description of theconstruction and operation ofthe same, reference being had to theannexed drawing making a part of this specification, and to the lettersand figures of reference marked thereon.

Figure l of the drawing is a representation of a vertical section of myinvention 5 Fig. 2 is a vertical section of modication of my invention;and Fig. 3 is a detail view of my invention. i i

My invention has relation to gasburning and hot-air stoves; and thenovelty consists in the construction and novel arrangement ofcommunicating hot-air drums and heat or flame passages and fines,whereby fresh air admitted to said drums above the nre-pot is heated andits temperature increased as it ascends to its escape-tubes, allsubstantially as hereinafter more fully described.

Referring to Figure 1 of the drawing, A

designates the lower part or body of my iin-v proved stove, having awide upright rim, a, bent up or formed at the outer part of a horizontalannular ange or shoulder, B, as shown. C represents a large cylindricalcasin g which fits down over the rim a, and thus surmounts the stovebody.

and supported upon the flange B by means of ears d. This cone maysometimes be supported by vertical rods passing through the cap of thecasing O, and furnished with nuts, by the proper adjustment of which thecone may be raised or lowered to any required distance from the re. Thetwo walls of the cone have an air-space, E, between them. The outer wallis open or perforated at its lower end or apex, while the inner wall isclosed at the same place, but is perforated around its upper edge, asshown. The inner wall has a iiange turned on its edge to rest on acorresponding flange projecting from the inner surface of the outerwall, as shown. F denotes a cylindrical rim encircling the upper part ofthe cone D. I usually cast the outer l D represents a double walledinverted cone, arranged above the fire-place,

wall ofthe cone with its supporting-lugs,

internal-flange, and cylindrical rim complete,'

.pipe G, becoming heated and rarefied as it ascends. Passing through theupper and horizontal branch of the pipe the air then necesl sarilydescends to find an escape, which is` provided at the lower end of theshort vertical arm of the pipe. Leaving said pipe the air comes incontact with the inner surface of the inner wall of the cone, which,being heated by the ire, further increases the temperature of the air,which raises and expands, and, being prevented from passing beyond thetop of the cone by the air-drums hereinafter described,

enters the air-space between the walls of the cone through theperforations b, and still continuing to increase in temperature,descends upon the fire through the openings or perforations in the lowerpart of the outer wall. At this point the airis intensely heated, and inthis condition mixing with the gas arising from the fire, causes saidgas to be consumed. H I J designate the hot-air drums incased within thecylinder C and communicating with each other by means of short tubes orflues K. The drum I exactly ts the interior of the cylinder at the placewhere it is located, while the drums H J are separated by annular spacesL through which the heat and dame passing from the fire through thespace M, which is between the upper part of the cone and the flange B,may circulate. After the heat and ame pass through the space encirclingthe drum H they are deiiected by the drum I and are thus spread over itsunder surface and over the upper surface ofthe drum H. They then ascendthrough a tube, M', in the center of the drum I, and thence spread outso as to circulate around .the drum J. Finally the heat, together withthe smoke, escapes lthrough-a pipe, N, at the apex of a conical cap, O,placed over the cyl under C. By this arrangement of the drums the heatis brought in Contact with every p0rtion of their surfaces and of thesurfaces of the hot-air tubes. The air to be heated by this means entersthe lower drum by a pipe7 l, and aft-er passing through all the drumsand becoming heated as it ascends passes oit through tubes Q, leadingfrom the conical cap R surmounting the drum` J. The drum His connectedto the outer wall ofthe cone by being inserted Within the rim F.

What I claim as my invention, and desire to secure by Letters Patent,is-

l. The air-drums H I J, and tubes K M P

